Update JSONKit and remove a noisy compiler warning
Update JSONKit and remove a noisy compiler warning

lumoslabs/GRMustache,ThesaurusSoftware/GRMustache,ThesaurusSoftware/GRMustache,mz2/GRMustache,ThesaurusSoftware/GRMustache,saim80/GRMustache,saim80/GRMustache,groue/GRMustache,ipmobiletech/GRMustache,ipmobiletech/GRMustache,sdonly/GRMustache,lumoslabs/GRMustache,saim80/GRMustache,sdonly/GRMustache,mz2/GRMustache,samdeane/GRMustache,mz2/GRMustache,groue/GRMustache,samdeane/GRMustache,samdeane/GRMustache,groue/GRMustache,ipmobiletech/GRMustache,lumoslabs/GRMustache,sdonly/GRMustache